(1)化简:8(a-b)2+4(a-b)+5(b-a)-6(b-a)2
(2)化简:3x3-[x3+(6x2-7x)]-2(x3-3x2-4x)
(1)
(2)15x
2.---What about seeing a film after dinner?
---_______.
A.The film tickets are expensive
B.I’d like to, but I have to help my mother with her housework
C.I don’t think so
D.I don’t like the idea
SQL语句中,SELECT语句中的JOIN是用来建立表间的联系短语,应放在下列哪个短语之后( )。
A.FROM
B.WHERE
C.ON
D.GROUP BY